<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* div>p:first-child {
            color: red;
        } */

        /* div p:first-child {
            color: red;
        } */

        p:first-child {
            color: red;
        }

        #jsj span .jjsjs {
            color: #000;
            background-color: #000;
        }
    </style>
</head>

<body>
    <p>hh</p>
    <div>
        <!-- <p>11</p>
        <p>22</p>
        <p>33</p>
        <p>44</p> -->
        <p>00</p>
        <marquee>
            <p>11</p>
            <p>88</p>
        </marquee>
        <p>22</p>
        <p>33</p>
        <p>44</p>
    </div>
</body>

</html>